half: n. (pl. halves ) 1.半,一半;一部分。 ...astern: adv. 1.【航海】在船[机]尾,向船[机]尾。 2. ...both: adj. 两,双,双方,两面,二者。 both time ...half astern both engines!: 双退二half astern: 半速倒车; 半速后退; 后退二full astern both engines!: 双退三slow astern both!: 双车后退一slow astern both engines!: 双退一half astern port!: 左车后退二左车后退二!左退二half astern starboard!: 右车后退二右车后退二! 右退二half speed astern: 半速倒车half turn astern: 倒车抵制前进half ahead both engines!: 双进二half ahead both!: 双车前进二astern: adv. 1.【航海】在船[机]尾,向船[机]尾。 2.在后,向后。 ship next astern 后续舰。 astern of 在…的后面。 back astern 倒驶。 drop [fall] astern 落在别船后头,被赶过。 Go astern! 后退!〔口令〕。 astern of: 在...的后面both: adj. 两,双,双方,两面,二者。 both times两次。 both sides 双方。 both these books这两本书。 both (the) brothers兄弟二人。 both his hands 两手。 B- girls are beautiful. 两个姑娘都漂亮。 I don't want both books. 我不是两本书都要〔只要其中一本〕。 have it both ways (在议论中)忽左忽右〔以自相矛盾的观点作为论据〕。 not both 一面,单独。 pron. 两者,二者,双方。 B- are dead. 这两人都死了。 both of them 他们双方,两者都。 B- of the girls are beautiful. 两个姑娘都漂亮。 They were scientists both. 双方都是科学家〔both 与 they 同格〕。 I don't know both. 我不是两个人都认识〔只认识其中之一〕。 adv. 皆,哪个都;并且,兼,又〔用在有and 连接的二个以上词句前,与neither...nor 正相反〕。 B- brother and sister are dead. 哥哥和妹妹都死了。 It is both good and cheap. 它又便宜又好,它价廉物美。 She can both sing and dance. 她又会唱歌又会跳舞,她能歌善舞。 both before the war and during the war 无论在战前还是在战时。 both Chaucer and Shakespeare and Milton 无论是乔塞、莎士比亚还是弥尔顿。 both a and: 和都; 既...又both… and: 既…又; 连接的并列主语both… and …: 既…又both…not…: 不都是……(部分否定)not both: “与非”门not both=both not: 并非两个都.ahead and astern: 倒顺车; 正倒车astern attack: 后半球攻击